Automatic microanalyzers: IV. Automatic analyzer for rapid microdetermination of chlorine or bromine in organic compounds

An automatic microdetermination of chlorine or bromine in organic compounds is described. The sample is weighed out in an aluminum microbeaker which is dropped into a vertical combustion tube, previously described, the quartz combustion chamber of which is heated up to 1050 °C. A flash combustion in oxygen takes place and the gaseous combustion products are absorbed in a cell with a circulating absorption solution of acetic acid and hydrazine hydrate as a reducing reagent in water.Both halogens give halogenide ions in the absorption solution where they are titrated coulometrically by electrolytic silver ions with an amperometric titration end point. The precision of the results is the same as that obtained with common microanalytical techniques.